Seiko Cal. 6634 - 303

The Seiko 6634-303 represents an important milestone in Seiko's 1967 lineup. Powered by the 6634 caliber with 25j jewels beating at 21,600 bph, it delivers a 63 hours power reserve. [seikata-wm-f70d58e112f2]

Also known as: Turtle, Sumo

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

37mm

Case Thickness

11.6mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Burgundy

Jewels

25j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1967

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